CN103221554B - Method for increasing the penetration depth of oxygen stream - Google Patents
Method for increasing the penetration depth of oxygen stream Download PDFInfo
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- CN103221554B CN103221554B CN201180041138.0A CN201180041138A CN103221554B CN 103221554 B CN103221554 B CN 103221554B CN 201180041138 A CN201180041138 A CN 201180041138A CN 103221554 B CN103221554 B CN 103221554B
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- Prior art keywords
- oxygen
- oxygen stream
- stream
- packed bed
- gas
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- 239000001301 oxygen Substances 0.000 title claims abstract description 170
- 229910052760 oxygen Inorganic materials 0.000 title claims abstract description 170
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 title claims abstract description 168
- 238000000034 method Methods 0.000 title claims abstract description 37
- 230000035515 penetration Effects 0.000 title claims abstract description 25
- 229910000805 Pig iron Inorganic materials 0.000 claims abstract description 34
- 238000004519 manufacturing process Methods 0.000 claims abstract description 25
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 15
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 14
- 238000005516 engineering process Methods 0.000 claims abstract description 9
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 claims abstract description 8
- 238000003723 Smelting Methods 0.000 claims abstract description 4
- 239000007789 gas Substances 0.000 claims description 52
- 239000007788 liquid Substances 0.000 claims description 26
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 8
- 230000015572 biosynthetic process Effects 0.000 claims description 7
- 239000007787 solid Substances 0.000 claims description 7
- 239000000446 fuel Substances 0.000 claims description 5
- 238000002485 combustion reaction Methods 0.000 claims description 4
- 229910052757 nitrogen Inorganic materials 0.000 claims description 4
- 238000007664 blowing Methods 0.000 claims description 3
- 238000002156 mixing Methods 0.000 claims description 3
- 238000002844 melting Methods 0.000 abstract description 29
- 230000008018 melting Effects 0.000 abstract description 29
- 239000003610 charcoal Substances 0.000 description 29
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 8
- 239000002245 particle Substances 0.000 description 7
- 239000000589 Siderophore Substances 0.000 description 5
- 238000005243 fluidization Methods 0.000 description 5
- 238000002309 gasification Methods 0.000 description 5
- 238000010438 heat treatment Methods 0.000 description 5
- 239000003245 coal Substances 0.000 description 4
- 239000003345 natural gas Substances 0.000 description 4
- 239000002918 waste heat Substances 0.000 description 4
- 239000000571 coke Substances 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 239000000567 combustion gas Substances 0.000 description 2
- 230000006378 damage Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000003546 flue gas Substances 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 239000003921 oil Substances 0.000 description 2
- 150000002926 oxygen Chemical class 0.000 description 2
- 230000000149 penetrating effect Effects 0.000 description 2
- 238000010079 rubber tapping Methods 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 239000002893 slag Substances 0.000 description 2
- 241000196324 Embryophyta Species 0.000 description 1
- 235000006508 Nelumbo nucifera Nutrition 0.000 description 1
- 240000002853 Nelumbo nucifera Species 0.000 description 1
- 235000006510 Nelumbo pentapetala Nutrition 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 208000002352 blister Diseases 0.000 description 1
- 150000001721 carbon Chemical class 0.000 description 1
- 239000002817 coal dust Substances 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000007872 degassing Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 238000011049 filling Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 244000144980 herd Species 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 238000005272 metallurgy Methods 0.000 description 1
- 239000003595 mist Substances 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 238000005325 percolation Methods 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B3/00—General features in the manufacture of pig-iron
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B13/00—Making spongy iron or liquid steel, by direct processes
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B5/00—Making pig-iron in the blast furnace
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B5/00—Making pig-iron in the blast furnace
- C21B5/001—Injecting additional fuel or reducing agents
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B5/00—Making pig-iron in the blast furnace
- C21B5/001—Injecting additional fuel or reducing agents
- C21B5/003—Injection of pulverulent coal
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B7/00—Blast furnaces
- C21B7/16—Tuyéres
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
- F27B1/00—Shaft or like vertical or substantially vertical furnaces
- F27B1/10—Details, accessories, or equipment peculiar to furnaces of these types
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D3/00—Charging; Discharging; Manipulation of charge
- F27D3/16—Introducing a fluid jet or current into the charge
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Metallurgy (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
- Manufacture Of Iron (AREA)
- Manufacture And Refinement Of Metals (AREA)
- Vertical, Hearth, Or Arc Furnaces (AREA)
- Carbon Steel Or Casting Steel Manufacturing (AREA)
Abstract
The present invention relates to a kind of for increasing the method for the penetration depth of the oxygen stream of technology pure oxygen, the oxygen stream is entered in pig iron production equipment, the preferably packed bed of smelting reduction equipment/melting gasifier or oxygen blast blast furnace with volume flow and mass flow, for the carbon carrier being present in packed bed that gasifies, it is characterized in that, increasing the volume flow of the oxygen stream and the ratio of mass flow.
Description
Technical field
The present invention relates to a kind of for increasing the method for the penetration depth of the oxygen stream of technology pure oxygen, the oxygen stream
It is entered in the packed bed (Sch ü ttung) of pig iron production equipment with volume flow and mass flow, is filled out for gasifying to be present in
Fill the carbon carrier in bed.
Background technique
In pig iron production equipment, such as blast furnace or smelting reduction equipment (such as in method COREX or FINEX
Used in melting gasifier) in manufacture the pig iron when, pass through the gas of carbon carrier in the case where being blown into hot wind or oxygen stream
Change obtains reducing gas.By means of the siderophore of this reducing gas reduction-oxidation and then by the obtained material reduced
Material is melt into the pig iron.
In the melting gasifier applied in COREX and FINEX method, pacify around oxygen jet melting gasifier
Between the siege and charcoal bed of melting gasifier, it is used to melt to manufacture reducing gas and provide vaporized carbon will be used for
The oxygen of energy required for siderophore is blown into the filling of melting gasifier around melting gasifier as homogeneously as possible
In bed.The pig iron of liquid and the clinker of liquid are generated in siderophore fusing.In this melting gasifier below oxygen jet
Region is known as siege, and reducing gas percolation will not occur wherein.There are the pig iron of liquid, the clinker of liquid and one in siege
Part charcoal.The carbon carrier of heat degassing is known as charcoal.It is located at oxygen jet area above in melting gasifier at this and is known as charcoal bed.
The charcoal bed in addition to the pig iron of liquid and the clinker of liquid and charcoal further include unfused and partial reduction siderophore and
Additive.The charcoal bed is flowed by the reducing gas formed when the oxygen of introducing is converted.It is entered across oxygen jet
Oxygen stream in melting gasifier forms so-called channel in the inside of melting gasifier, has occurred that in the channel
The gasification of carbon carrier, wherein having produced reducing gas.Channel is interpreted as the vortex before oxygen jet herein, in institute
It states in vortex and reducing gas is generated by oxygen and carbon carrier.Concept vortex there is described herein high in the region in the channel
The flow behavior of the similar backset bed of vortex.The oxygen stream of entrance produces cavity in the packed bed of charcoal bed.The cavity
Due to the oxygen stream of entrance momentum and generated due to the gasification reaction of oxygen and charcoal.The region in cavity is known as channel.
The channel has significant higher voidage compared with the charcoal bed for showing as thermopnore.The channel is according to the cloth of oxygen jet
The inside around melting gasifier in melting gasifier is set to extend in horizontal plane.Length viewed from above by channel
The cross section that degree is formed is also referred to as effective anchor ring, wherein effectively referring in this concept of effective anchor ring, the pig iron and liquid of liquid
The drainage of the clinker of state due to channel voidage and pass through the channel particularly well and carry out, and refer to due to carbon carrier
The reducing gas that gasification generates enters in charcoal bed from the channel.The width of effective anchor ring is true by the length dimension in channel
It is fixed, and thus and then by the penetration depth of oxygen stream determine.
Even for by being surround hot wind or oxygen in the nozzle (also referred to as air port) being distributed around blast furnace accordingly
For the blast furnace that air-blowing enters, the channel with effective anchor ring is also formed in the region of nozzle.
For the charcoal bed of melting gasifier, in the commonly used technology with the temperature between -15 DEG C to+45 DEG C
When the oxygen stream that pure oxygen is constituted, and due to the oxygen jet of installation with the blast furnace run with hot wind compared with it is lesser directly
Diameter obtains significant smaller oxygen stream into packed bed compared with the solid-state bed present in the blast furnace run with hot wind
Penetration depth.Therefore it obtains transporting with hot wind around melting gasifier by shorter or narrower channel in charcoal bed
Capable blast furnace compares lesser effective anchor ring, thus the gas-premeable of reducing gas to charcoal bed or the pig iron and liquid of liquid
Clinker to siege drainage it is all relatively worse.Furthermore by using lump coal and/or briquet compared with the blast furnace run with coke
The hydraulic diameter that the charcoal base (Charmatrix) in melting gasifier is reduced as carbon carrier, thus make liquid the pig iron and
The outflow of the clinker of liquid, particularly high viscosity becomes difficult, this can be existed due to the pig iron of liquid and/or the clinker of liquid
Blocking occurs before oxygen jet and leads to failure.
Increase penetration depth of the oxygen stream into packed bed not only in the blast furnace run with oxygen but also in fusing gas
Change and significantly increases effective area in device and hence improve the outflow of the pig iron of liquid and the clinker of liquid.
Reducing gas flows essentially upward.From the point of view of the flow direction of reducing gas after channel, that is,
There is the region of undesirable fluidisation, also referred to as bubble in melting gasifier or blast furnace packed bed in the upper surface of channel
It forms (Blasenbildung) or pipeline forms (Kanalbildung).In this region gas flow at elevated pressures into
Enter into the packed bed being made of solid matter, and the mixture of generated solid matter and gas behaves like stream
Body.The formation in the region of fluidisation is undesirable, because it can result in across melting gasifier or blast furnace packed bed
So-called blow.It blows thoroughly and results in gas flowing, dust load and the gas ingredients exported by melting gasifier or blast furnace
The variation increased suddenly, this is more difficult to control the operation of this equipment.Furthermore melting gasifier will be come from when blowing thoroughly
Either the particle of blast furnace is distributed in the pipeline for drawing reducing gas or installation for blast furnace gas.
Furthermore the region fluidized is undesirable, because passing on from one to another since it hinders the optimal of gas and solid matter
It leads.It will appear the mixing of the material in region and following region from the upper surface of charcoal bed in the region of fluidisation, then for example
The iron oxide in the region from the upper surface of charcoal bed reaches in the region below charcoal bed, and by the region below charcoal bed
In restore completely and the iron that has melted of part be transported in its area above.
When being introduced into bigger gas flow, particularly bigger amount of oxygen into packed bed, for melting gasifier and with
For the blast furnace of oxygen operation, the danger for generating the region of fluidisation is increased in the case where penetration depth remains unchanged.
When the penetration depth of oxygen stream relative to basic status increase when, determining gas flow can with basic status
It is entered in packed bed compared on the area of increase by channel.The pressure condition to form the region of fluidisation is accordingly resulted in oxygen
Nozzle is spatially and temporally upper less with basic status compared with nearby to be occurred, and as a result, the region fluidized in oxygen
Nozzle nearby smaller and less frequently occurs.
The region of packed bed is entered, namely in channel in oxygen stream in melting gasifier, due to high flowing
Speed (compared with blast furnace more times in height), chemistry and hot volume expansion and due to the average-size phase with the coke in blast furnace
, there is vortex in smaller charcoal size.According to known rule, in practice not due to the higher flowing speed of oxygen stream
It spends and obtains the increase of penetration depth.The flowing velocity for improving oxygen stream can improve the mechanical load to charcoal.It is described mechanical negative
Lotus due between the particle of oxygen stream and the component part of charcoal bed (namely charcoal) momentum transmitting and then due to
The mutual momentum of the component part of charcoal bed is transmitted and is improved.Due to by momentum transmit or thus caused by mechanical load led
The abrasion of the charcoal of cause or solution are known from experience forms more particles in vortex.
The unit impulse of each square measure transmitting is determining parameter for the disintegration of charcoal.Its characteristic parameter is punching
Hit power, the impact force represent in square measure unit impulse.But more particles lead to channel in vortex
The change of the case where reduction of the hydraulic diameter of vortex, this makes the pig iron of liquid and the clinker of liquid pass through the outflow of effective anchor ring again
It is bad.
In the case where solid-state bed in blast furnace, the increase of penetration depth can be obtained by improving oxygen velocity.Herein
In the blast furnace run with hot wind and with there are significant differences between the blast furnace of oxygen operation.The penetration depth of oxygen stream with
With significant smaller compared with equal-wattage is with the penetration depth of hot wind in the blast furnace of hot wind operation in the blast furnace of oxygen operation.It
So in this way, be because introduce gas mass flow it is smaller for oxygen stream because unlike for hot wind with
Required amount of oxygen is collectively incorporated into there are also a large amount of nitrogen together.In the case where the blast furnace run with oxygen, exist in order to obtain
The penetration depth to occur in the blast furnace of hot wind operation of equal-wattage, must just improve oxygen speed compared with the speed of hot wind
Degree-still may cause herein, it has been observed that the machinery to the coke in blast furnace improved due to caused by momentum transmitting
The lower gas-premeable of solid-state bed in destruction and the blast furnace correspondingly occurred due to particle formation.
Summary of the invention
The task of the present invention is to provide a kind of for oxygen stream to be introduced into the packed bed of pig iron production equipment
Method, wherein avoiding above-mentioned disadvantage.
The task is solved by a kind of method for increasing the penetration depth of the oxygen stream of technology pure oxygen, the oxygen
Beam is entered with volume flow and mass flow in the packed bed of pig iron production equipment,
For the carbon carrier being present in packed bed that gasifies,
It is characterized in that,
Increase the volume flow of the oxygen stream and the ratio of mass flow.
Technically pure oxygen has the oxygen content of at least 85% percent by volume, particularly preferably at least 90% percent by volume.
It is preferred that pig iron production equipment is smelting reduction equipment such as melting gasifier or oxygen blast blast furnace.
Ratio by increasing volume flow and mass flow increases penetration depth.
Mass flow and volume flow are related with given operating status；Namely refer to and exists in given operating status
Pressure and temperature under the conditions of mass flow and volume flow.
It will increase effective anchor ring of melting gasifier by increasing penetration depth of the oxygen stream into packed bed.Therefore work as
When reducing gas is flowed up across charcoal bed, it may appear that the lower flowing velocity of the reducing gas.Thus on the one hand reduce
For the backset bed present in melting gasifier it is typical but it is not expected that bubble formation, and on the other hand improve
The heat exchange and mass exchange between packed bed in reducing gas and melting gasifier.
The area for increasing the slag outflow of the pig iron for making liquid and liquid, is reduced with this for being used for oxygen stream
It is introduced into the crucial blocking of this fluid for the oxygen jet in melting gasifier.Furthermore by increasing oxygen according to the present invention
The penetration depth of gas beam obtains better metallurgy condition in siege (Herd) (such as between slag and the solid-state and liquid of the pig iron
Better phase transformation) and relative to the improved tapping condition of smaller penetration depth (tapping technique in occur it is less
Failure).
It is preferred that increasing volume flow in the case where mass flow remains unchanged.
The oxygen of the amount remained unchanged is introduced into packed bed by each chronomere in this case.
The mass flow remained unchanged is understood with the meaning of equipment and technology herein and is also included due to adjusting to given
Operating status (such as passing through given fusing power, heat demand amount, the type of used raw material, pressure, temperature determination)
And the fluctuation relative to value up to +/- 10% desired in given operating status occurred.
Oxygen stream is entered in packed bed with flowing velocity.
According to a kind of embodiment according to the method for the present invention, the temperature of oxygen stream is improved.
Increase the ratio of volume flow and mass flow by improving the temperature.
Advantageously, other forms can be saved by energy being introduced into pig iron production equipment related to thisly
Energy introduce, such as fuel is added in the pig iron production equipment.
According to another embodiment according to the method for the present invention, oxygen is improved in the case where flowing velocity remains unchanged
The temperature of gas beam.
The flowing velocity remained unchanged herein is understood with the meaning of equipment and technology and is also included due to adjusting to given
Operating status and the fluctuation relative to the desired value up to +/- 10% in given operating status that occurs.
By the measure for keeping flowing velocity to remain unchanged, keep the momentum of the oxygen stream as caused by flowing velocity permanent
It is fixed.In penetration depth and under entering the increased situation of area, impact force reduces therewith.Correspondingly less particle is consequently formed.
In order in the case where the temperature of oxygen stream is improved relative to initial value when flowing velocity remains unchanged guarantor
Constant mass flow is demonstrate,proved, although the density of oxygen stream reduces when the temperature rises, in the case where the temperature improves
The diameter of oxygen jet ready for use is also designed correspondingly bigger.
Furthermore it will be appreciated that making isolation inside oxygen jet or completely cutting off the oxygen pipeline of oxygen jet simultaneously
And/or person is designed so that heat loss very little.
In order to be preheated to it before improving the temperature of oxygen stream in the packed bed that it enters pig iron production equipment.
This can be realized in combination by means of the single or multiple method in method cited below:
Solid, liquid or gaseous fuel (such as the technique by having used the pig iron of pig iron production equipment to produce
And the process gas generated, such as the top gas generated from reduction vertical shaft；Such as natural gas) and oxygen together pass through burner fire
It burns, and by the hot gas obtained herein and oxygen mix.
It is preferred that generation is mixed in the combustion chamber of burner with this of oxygen in this case, to minimize to guiding
The temperature of the lining of the pipeline of oxygen influences.
Oxygen is mixed with the nitrogen of steam and/or heat in mixing chamber or in described blow on position.
Indirect heat exchanger is used, such as
In the case where being preheated by the waste heat using COREX/FINEX process gas,
In the case where being preheated by steam,
In the case where being preheated by other heat carrier such as hot oils or nitrogen,
By the burning by fuel come heat flue gas preheated in the case where.This also can for example by by
Existing equipment for example for coal drying device, reducing gas furnace, generating equipment equipment and come heat flue gas carry out.
Such as condensate and heat exchanger or Back-pressure steam heat exchanger can be used when being preheated by steam.Steam
Source must have high availability anyway.
Warmed-up oxygen for should be able to directly be carried out by the oxygen production equipment that is used to provide oxygen.Also
It is to say the oxygen for being also able to use the heat generated in oxygen production equipment, i.e., with or without additional heating.According to root
According to a kind of implementation variant of the invention, pass through the work of oxygen and the heat of oxygen production technique in oxygen production equipment in this oxygen
The indirect heat exchange of skill air is heated.Implement variant according to another kind, oxygen is by adiabatically pressing gaseous oxygen
Retraction row heating.
The heating of oxygen can also with two-stage carry out, and mode is for example to be preheating to for example under small oxygen pressure first
100-150 DEG C, and then adiabatically it is compressed to about 300 DEG C.
According to another embodiment according to the method for the present invention, it is also possible by means utilize plasma burner pair
Oxygen preheats and realizes the preheating of oxygen with not oxygen mix preheated in this way.
It is preferred that waste heat of the oxygen by oxygen production equipment and/or the waste heat by generating equipment are heated.
Oxygen production equipment is primarily referred to as air gas separation unit (Air Separation Unit) ASU herein.This
There is multiple compressors such as main air compressor (Main Air Compressor) MAC, booster air compressor in ASU
(Booster Air Compressor) BAC.Particularly in combined-cycle power generation plant (Combined Cylce Power
Plants there is combustion gas turbine in), the combustion gas turbine is coupled with air compressor.
This compressor downstream in air production equipment or power station is generated through the warmed-up gas of compressor,
Its heat is as Decay heat removal into environment.This waste heat is preferred for the oxygen that heating is introduced into the fixed bed of melting gasifier
Gas.The temperature of raising oxygen stream reduces the demand to the carbon carrier for providing energy required by fusing siderophore.Cause
The technique of this pig iron production is more low in cost and reduces the specific emissions in pig iron production, especially CO2Discharge.
Oxygen stream enters in packed bed in the case where entering pressure, described so to select into pressure, i.e., this enters pressure
The pressure loss that the reducing gas formed in oxygen conversion can be overcome to occur when reaching quiescent chamber by charcoal bed.
According to a kind of embodiment according to the method for the present invention, in the case where mass flow remains unchanged described in reduction
Into pressure.Technique in order to produce the pig iron continues, for example reduce at the same time pressure in quiescent chamber or
Person reduces charcoal bed to reduce the pressure loss.It can be obtained in the case where mass flow remains unchanged by being lowered into pressure
Higher volume flow.The mass flow remained unchanged herein with the meaning of equipment and technology come understand and also include due to adjust
The fluctuation relative to the desired value up to +/- 10% in given operating status that occurs to given operating status.
In order to guarantee that mass flow is kept not in the case where the entrance pressure of oxygen stream is reduced relative to initial value
Become, although the density of oxygen stream reduces in pressure reduction, the oxygen ready for use in the case where the pressure reduction
The diameter of nozzle is also designed correspondingly bigger.
It is preferred that the temperature of the oxygen stream entered in packed bed is at least 200 DEG C, preferably at least 250 DEG C.
It is preferred that the flowing velocity for entering the oxygen stream in packed bed be in 100m/s to velocity of sound in the range of, it is excellent
It is selected in the range of 150-300m/s.Under the conditions of velocity of sound described herein refers to the Pressure/Temperature of oxygen when entering.
Exist lower than 100m/s since the pig iron of liquid flows back in nozzle the big danger for causing nozzle to damage.From velocity of sound
It rises and the high pressure loss via oxygen jet occurs and be used to form the high energy for pressure necessary to such speed
Amount demand.Furthermore big oxygen stream momentum associated with such a high speed largely causes undesirable particle
It is formed.
According to a kind of advantageous embodiment according to the method for the present invention, together with the oxygen stream, realize carbon
Carrier is entered in the oxygen stream and is filled out in the form of solid or liquid or gaseous, such as coal/oil/natural gas
It fills before the channel (Race-way) formed in the region in bed and/or is injected in oxygen stream in the channel.
Following effect is obtained herein, i.e., by the gasification of this carbon carrier, flows into the packed bed with only oxygen
Compare, formed in the channel bigger available gas volume and be introduced into the packed bed-because of the introducing
Gas volume is by the oxygen stream entered and the gas beam of the so-called generation of gas composition-generated in gasification.That is
In the case where the amount of the oxygen entered in packed bed is constant, realize entrance, formed gas beam volume flow with
The increase of the ratio of mass flow.The amount and oxygen stream of penetrating (are injected in the gas beam of the formation or are injected to this
In the channel of the gas beam of formation) purity so select so that the gas beam of the formation still always technology pure oxygen.
Coal is, for example, coal dust.
Input to oily such as fine mist.
Natural gas is preferably preheating to the temperature of oxygen stream.Natural gas is interpreted as being formed in the technique that the pig iron produces
Reducing gas or output gas, the technique that wherein oxygen facilitates pig iron production.
Mass flow, volume flow, temperature, the pressure of oxygen stream and for mass flow, volume flow, temperature,
It is related that these indexs of the value of the pressure of oxygen stream with oxygen stream are fed into the position in packed bed.
Detailed description of the invention
Fig. 1 to 3 illustrates the effect obtained according to the present invention according to curve.
Fig. 4,5 and 6 illustratively and show schematically how that oxygen can be improved under the flowing velocity remained unchanged penetrates
The temperature of beam.
Specific embodiment
Fig. 1 shows example in the following areas, i.e., when the ratio of the volume flow of oxygen stream and mass flow increases
The penetration depth of oxygen stream increases.The mass flow is constant.Fig. 1 is illustratively shown, in volume flow and about 90%
Mass flow ratio from substantially 0.22m3/ kg increases to substantially 0.42m3The penetration depth increase of oxygen stream is substantially when/kg
15%.This be suitable for two shown in flowing velocity.
Example in the following areas is also shown in Fig. 2, i.e., when the ratio of the volume flow of oxygen stream and mass flow increases
Oxygen stream increases to the penetration depth in the packed bed of melting gasifier when big.The mass flow of the oxygen stream is kept not
Become.In order to remain unchanged the flowing velocity when the temperature of oxygen stream improves, bigger oxygen is used at higher temperatures
Nozzle diameter (is abbreviated as nozzle diameter) in the accompanying drawings.As shown in Figure 2, in the mass flow remained unchanged and the stream remained unchanged
In the case where dynamic speed, penetration depth increases as temperature increases.Because raised temperature means about reduced density
Bigger volume, therefore as the increase of the ratio of the volume flow and mass flow of oxygen stream obtains increased penetrating depth
Degree.
Fig. 3 shows the volume flow of oxygen stream and the ratio of mass flow with the entrance pressure of reduction or with increasing
High temperature and increase.
Basis is for the attached drawing shown, pure oxygen 2200Nm3The mass flow of/h and oxygen from oxygen spray
The absolute pressure of exit 5.5bar or 4.5bar that mouth comes out.
Fig. 4,5 and 6 illustratively and schematically illustrate, and how to improve oxygen under the flowing velocity remained unchanged and penetrate
The temperature of beam.Oxygen jet is showed schematically on attached drawing edge respectively on the right herein.
Fig. 4 is schematically illustrated, and how oxygen 1 heats in the following manner, i.e., gaseous fuel (makes in this case
Top gas 2 being generated with the pig iron making process of pig iron production equipment, being generated from unshowned reduction vertical shaft) and oxygen 1
A part is burnt in burner 3, and the hot gas obtained in burning is mixed with unburned oxygen 1.It is this to be blended in
In this case occur in the combustion chamber of burner 34, the temperature of the lining of the pipeline of guiding oxygen is influenced with minimizing.
The pressure of oxygen stream remains unchanged herein, and only temperature increases.
Fig. 5 is schematically illustrated, and how oxygen 1 is heated by using indirect heat exchanger 5.In indirect heat exchanger 5
The middle heat transfer by steam 6 is to oxygen, and wherein the pressure of oxygen stream remains unchanged.
Fig. 6 is schematically illustrated, and how the heating of oxygen 1 is realized to two-stage.First under low oxygen stream pressure by
It is preheated, and then this oxygen preheated is carried out in compressor 7 exhausted in indirect heat exchanger 5 and steam 6
Thermally compress.Oxygen stream passes through in adiabatically expanding in expansion device 8 and being expanded by initial pressure before preheating herein
Between pressure, wherein oxygen stream temperature decline.After carrying out subsequent preheating to the oxygen under the intermediate pressure,
Oxygen then turns again to initial pressure in the compression of insulation and is heated to desired temperature herein.
Reference signs list
Oxygen 1
Top gas 2
Burner 3
Combustion chamber 4
Heat exchanger 5
Steam 6
Compressor 7
Expansion device 8.
Claims (9)
1. a kind of for increasing the method for the penetration depth of the oxygen stream of technology pure oxygen, the oxygen stream is sprayed by means of oxygen
Mouth is entered with volume flow and mass flow and with flowing velocity in the packed bed of pig iron production equipment, is existed for gasifying
Carbon carrier in packed bed,
It is characterized in that,
The diameter that the volume flow of the oxygen stream passes through increase oxygen jet in the case where mass flow remains unchanged
Increase, wherein the temperature of the oxygen stream is improved in the case where the flowing velocity remains unchanged, wherein by keeping stream
The momentum of the measure that dynamic speed remains unchanged, the oxygen stream as caused by flowing velocity is kept constant.
2. method according to claim 1, which is characterized in that by means of the single or multiple side in method cited below
Method improves the temperature of the oxygen stream in combination:
Solid, liquid or gaseous fuel and oxygen pass through burner combustion, and the hot gas that will be obtained herein together
Body and oxygen mix,
Oxygen is mixed with the nitrogen of steam and/or heat in mixing chamber or on blowing into position,
Indirect heat exchanger is used,
By means of plasma burner to oxygen preheat and with not oxygen mix preheated in this way.
3. by the method described in any one of claims 1 to 2, wherein the oxygen stream entered in the case where entering pressure it is described
In packed bed, which is characterized in that reduced in the case where the mass flow remains unchanged described into pressure.
4. by method described in any one of claims 1 to 2, which is characterized in that the oxygen entered in the packed bed
The temperature of gas beam is at least 200 DEG C.
5. method according to claim 4, which is characterized in that the temperature for entering the oxygen stream in the packed bed
It is at least 250 DEG C.
6. by method described in any one of claims 1 to 2, which is characterized in that the oxygen entered in the packed bed
The flowing velocity of gas beam is in the range of 100m/s to velocity of sound.
7. method according to claim 6, which is characterized in that the flowing for entering the oxygen stream in the packed bed
Speed is in the range of 150-300m/s.
8. by method described in any one of claims 1 to 2, which is characterized in that together with the oxygen stream, realize carbon
Carrier is in the form of solid or liquid or gaseous in the region that the oxygen stream enters in the packed bed
It is injected in oxygen stream before the channel of formation and/or in the channel.
9. method according to claim 1, which is characterized in that the pig iron production equipment is smelting reduction equipment, fusing gas
Change device or oxygen blast blast furnace.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| ATA1422/2010 | 2010-08-25 | ||
| ATA1422/2010A AT510313B1 (en) | 2010-08-25 | 2010-08-25 | METHOD FOR INCREASING THE INTRUSION DEPTH OF A OXYGEN BEAM |
| PCT/EP2011/062880 WO2012025321A2 (en) | 2010-08-25 | 2011-07-27 | Method for increasing the penetration depth of an oxygen stream |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103221554A CN103221554A (en) | 2013-07-24 |
| CN103221554B true CN103221554B (en) | 2019-02-22 |
Family
ID=44543202
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201180041138.0A Expired - Fee Related CN103221554B (en) | 2010-08-25 | 2011-07-27 | Method for increasing the penetration depth of oxygen stream |
Country Status (12)
| Country | Link |
|---|---|
| US (1) | US8808422B2 (en) |
| EP (1) | EP2609223B1 (en) |
| KR (1) | KR101813670B1 (en) |
| CN (1) | CN103221554B (en) |
| AT (1) | AT510313B1 (en) |
| AU (1) | AU2011295333B2 (en) |
| BR (1) | BR112013004417B1 (en) |
| CA (1) | CA2809192C (en) |
| PL (1) | PL2609223T3 (en) |
| RU (1) | RU2583558C2 (en) |
| UA (1) | UA106548C2 (en) |
| WO (1) | WO2012025321A2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AT510313B1 (en) | 2010-08-25 | 2013-06-15 | Siemens Vai Metals Tech Gmbh | METHOD FOR INCREASING THE INTRUSION DEPTH OF A OXYGEN BEAM |
| EP2626124A1 (en) * | 2012-02-13 | 2013-08-14 | Siemens VAI Metals Technologies GmbH | Method and device for reducing the raw materials containing iron oxide |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5234490A (en) * | 1991-11-29 | 1993-08-10 | Armco Inc. | Operating a blast furnace using dried top gas |
| CN101573456A (en) * | 2006-12-29 | 2009-11-04 | 乔治洛德方法研究和开发液化空气有限公司 | Process for making pig iron in a blast furnace |
Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2070864A1 (en) * | 1969-12-15 | 1971-09-17 | Jones & Laughlin Steel Corp | Blast furnace - injection of oxidising gas independently - of the blast to improve prodn |
| JP3523716B2 (en) * | 1994-11-02 | 2004-04-26 | Ｊｆｅスチール株式会社 | Scrap melting method |
| KR100264993B1 (en) * | 1996-12-23 | 2000-09-01 | 이구택 | Device and method of tuyere permeation length |
| US6030430A (en) * | 1998-07-24 | 2000-02-29 | Material Conversions, Inc. | Blast furnace with narrowed top section and method of using |
| DE102005032444A1 (en) * | 2005-07-12 | 2007-01-25 | Joachim Mallon | Nozzle system for graded injection of gases, vapors, powders or liquids into a shaft furnace for (s)melting metals and/or minerals comprises a nozzle head connected to a bustle pipe and a tuyere |
| US20070290418A1 (en) * | 2006-05-01 | 2007-12-20 | Sierra Energy Corporation | Tuyere For Oxygen Blast Furnace Converter System |
| DE102007027038B4 (en) * | 2007-06-08 | 2013-07-18 | Joachim Mallon | Method for oxygen injection |
| JP2009097051A (en) * | 2007-10-18 | 2009-05-07 | Nippon Steel Corp | Lance for blowing-in dust coal for blast furnace |
| AT506042A1 (en) | 2007-11-13 | 2009-05-15 | Siemens Vai Metals Tech Gmbh | METHOD FOR MELTING RAW IRONS AND STEEL PREPARED PRODUCTS IN A MELTING GASER |
| AT510313B1 (en) | 2010-08-25 | 2013-06-15 | Siemens Vai Metals Tech Gmbh | METHOD FOR INCREASING THE INTRUSION DEPTH OF A OXYGEN BEAM |
-
2010
- 2010-08-25 AT ATA1422/2010A patent/AT510313B1/en not_active IP Right Cessation
-
2011
- 2011-07-27 BR BR112013004417A patent/BR112013004417B1/en not_active IP Right Cessation
- 2011-07-27 CN CN201180041138.0A patent/CN103221554B/en not_active Expired - Fee Related
- 2011-07-27 WO PCT/EP2011/062880 patent/WO2012025321A2/en active Application Filing
- 2011-07-27 CA CA2809192A patent/CA2809192C/en not_active Expired - Fee Related
- 2011-07-27 RU RU2013112949/02A patent/RU2583558C2/en not_active IP Right Cessation
- 2011-07-27 KR KR1020137007316A patent/KR101813670B1/en active IP Right Grant
- 2011-07-27 PL PL11746203T patent/PL2609223T3/en unknown
- 2011-07-27 AU AU2011295333A patent/AU2011295333B2/en not_active Ceased
- 2011-07-27 UA UAA201302386A patent/UA106548C2/en unknown
- 2011-07-27 EP EP11746203.6A patent/EP2609223B1/en not_active Not-in-force
- 2011-07-27 US US13/818,344 patent/US8808422B2/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5234490A (en) * | 1991-11-29 | 1993-08-10 | Armco Inc. | Operating a blast furnace using dried top gas |
| CN101573456A (en) * | 2006-12-29 | 2009-11-04 | 乔治洛德方法研究和开发液化空气有限公司 | Process for making pig iron in a blast furnace |
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| 湿法脱硫旋流喷嘴体积流量变化规律及数值模拟;李兆东等;《中国电力》;20060805;第39卷(第8期);第68-71页 |
Also Published As
| Publication number | Publication date |
|---|---|
| EP2609223B1 (en) | 2017-03-22 |
| AT510313B1 (en) | 2013-06-15 |
| BR112013004417B1 (en) | 2018-10-09 |
| UA106548C2 (en) | 2014-09-10 |
| AU2011295333A1 (en) | 2013-03-07 |
| BR112013004417A2 (en) | 2016-05-31 |
| WO2012025321A2 (en) | 2012-03-01 |
| US8808422B2 (en) | 2014-08-19 |
| AU2011295333B2 (en) | 2015-05-28 |
| CA2809192A1 (en) | 2012-03-01 |
| RU2013112949A (en) | 2014-09-27 |
| CA2809192C (en) | 2018-05-01 |
| EP2609223A2 (en) | 2013-07-03 |
| WO2012025321A3 (en) | 2013-04-25 |
| RU2583558C2 (en) | 2016-05-10 |
| CN103221554A (en) | 2013-07-24 |
| AT510313A1 (en) | 2012-03-15 |
| KR101813670B1 (en) | 2017-12-29 |
| US20130154166A1 (en) | 2013-06-20 |
| KR20130080841A (en) | 2013-07-15 |
| PL2609223T3 (en) | 2017-09-29 |
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